Psychologists have proposed several theories about how environment might influence
homosexuality, but research has failed to support these theories.

Achievement

Researchers often use the thematic apperception test (TAT) to measure the
need for achievement.

People who have a high achievement motivation tend to be persistent and
hardworking. They are able to delay gratification to meet long-term goals, and they tend to
choose careers that allow them to compete with others.

People achieve the most when they have high expectations of
success,incentives that reward competence, control over
tasks,opportunities to achieve, and effective goals.

Goals are most effective when they are specific, moderately
difficult, and framed in terms of what must be done rather than what must
be avoided.